columbite

at one time, nigeria was the world's largest exporter of columbite .

尼一度曾是世界上最大的钶铁矿出口国。

There is high tantalite grade for certain large scale granite-pegmatite pattern tantalite-columbite mine in our country.

我国某大型花岗伟晶岩型铌钽矿含钽品位高居我国钽铌矿山之首.

the business: coltan -- short for columbite-tantalite -- is an ore that takes on heat-resistant properties when it gets refined.

商业：Coltan（钶钽铁矿，columbite-tantalite的缩写）是一种在经过提炼后能获得耐热性的铁矿。

study of intensive decomposition technique of titanium-columbite-tantalite ore

钛钽铌矿强化分解工艺的研究

on the basis of detailed studies on columbite from the suzhou granite, tantalite has been found for the first time in this granite.

本文在研究苏州花岗岩中铌铁矿的基础上，首次在该地区发现了钽铁矿。

The measurement indicates that the optimized performance can be achieved by three-element composite columbite precursor methods.

性能测试结果表明,三组元复合先驱体法制成样品的性能最佳.